Short answer: the Xtreme 4, for a real premium. It ranks #43 of 120 large speakers at $309.95; the ULT Field 5 ranks #59 at $348, $38.05 less.
The ULT Field 5’s own cons are unusually candid: bass not as deep as others in the category, and sound quality overall is just okay. It does add IP67 rating, a 25-hour battery, and a 10-band app EQ.
The Xtreme 4 has real flaws too. A removable battery is its headline feature, but its own cons describe a dip in the upper bass to midrange that can’t be EQ’d out, plus a high price for what it delivers.
Buy the ULT Field 5 if the price gap matters more than the ranking. Buy the Xtreme 4 for the removable battery and the stronger measured placement.
Want more options? Browse the full Portable Bluetooth rankings.
A rugged, waterproof speaker with clear, punchy sound, a swappable battery, a power bank and excellent real world battery life.
A tough, waterproof party speaker with loud, bass focused output, an aux input, a power bank and a long battery.
Prices on this page were last checked November 7, 2026 at 7:34 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| JBL Xtreme 4 | Sony ULT Field 5 | |
|---|---|---|
| Price | $309.95 | $348.00 |
| Ranked | #43 of 120 in Large Size Portable Bluetooth Speakers | #59 of 120 in Large Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 25 hours (Manufacturer specified) |
| EQ | Yes (5 band) | Yes (App + ULT button) |
| IP Rating | IP67 | IP67 |
| Bluetooth Latency | 220ms | - |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Auracast) | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C) | Yes (USB-C) |
| Power Input | USB-C | USB-C |
| Removable Battery | Yes | - |
| TWS | Yes | Yes |
| Weight | 4.6 lbs (2.1 kg) | 7.3 lbs (3.3 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Built-in Microphone | Yes | Yes |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 11.7” x 5.9” x 5.6” (297 x 149 x 141 mm) | 12.6” x 5.7” x 4.9” (320 x 144 x 125 mm) |
| Drivers | 2x 70mm woofers, 2x 19mm tweeters + 2x passive radiators | 2x 46mm tweeters + 1x 79mm x 107mm woofer |
| Frequency Response | 44Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 100W | 27W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | Yes (detachable shoulder strap) |
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